Not really how twitch works.
There will be plenty of viewers come Tuesday. Most major streamers who don't have it right now will still get a ton of viewers on Tuesday with the game.
If you are a smaller streamer, sure you won't get as many not being on the list right now, but you'll still get your normal viewers with a few more potentially due to hype of a new game.
I'm sorry you aren't press or a pro halo player and can't get on the list, but this is how it is. This is no different than when they let the press play games early to review it, etc. except they let the pro gamers in also to build up hype on the game.
edit: I also don't believe you regarding your 343 argument saying you'd let it slide, because you clearly have an agenda in that you want to play and stream the game to get viewers. You'd be whining just as much for another game because you can't get in on the pre-release hype and viewer numbers.